Disabled CC filter causes problems to start reception
Posted: Sun Oct 11, 2020 5:02 am
Hi!
At least in the development release from Oct. 4th, but probably in the earlier versions as well, there is a problem with disabled CC filter (not speaking about the "monitor" mode from the very latest release). When the CC filter is disabled, the following sequence happens when a regular, continuous DMR signal is appearing:
1) The green LED is illuminated.
2) Shortly after, one audio frame is played quickly several times, causing a funny sound
3) A bogus CC number is displayed on the display (obviously CC13 instead of CC1, but it possibly later changes to CC6 or CC5
4) The green LED goes dark.
5) There is a delay about 500 ms.
6) The green LED is illuminated again.
7) Another audio frame is played several times, causing another funny sound (this step is sometimes skipped)
8) The CC starts to indicate the correct CC
9) Received signal starts to play regularly.
The whole sequence takes approximately 3 seconds, thus the first words of the calling person are lost.
All this appears when receiving from the MMDVM hotspot in a simplex mode.
With regards, Pavel
At least in the development release from Oct. 4th, but probably in the earlier versions as well, there is a problem with disabled CC filter (not speaking about the "monitor" mode from the very latest release). When the CC filter is disabled, the following sequence happens when a regular, continuous DMR signal is appearing:
1) The green LED is illuminated.
2) Shortly after, one audio frame is played quickly several times, causing a funny sound
3) A bogus CC number is displayed on the display (obviously CC13 instead of CC1, but it possibly later changes to CC6 or CC5
4) The green LED goes dark.
5) There is a delay about 500 ms.
6) The green LED is illuminated again.
7) Another audio frame is played several times, causing another funny sound (this step is sometimes skipped)
8) The CC starts to indicate the correct CC
9) Received signal starts to play regularly.
The whole sequence takes approximately 3 seconds, thus the first words of the calling person are lost.
All this appears when receiving from the MMDVM hotspot in a simplex mode.
With regards, Pavel